Page 2 Introduction TDF for cdma2000 network was proposed in X50-20110725-031r1 CT+ZTE TDF architecture for cdma2000.pptx What are the TDF functions as defined by 3GPP? –The TDF is a functional entity that performs application detection and reporting of detected application and its service data flow description to the PCRF. –TDF performs following functions: Gating: –The gate status indicates whether the application, identified by the application identifier, may pass (gate is open) or shall be blocked (gate is closed) in uplink and/or in downlink direction Redirection: –The Redirect indicates whether the detected application traffic should be redirected to another controlled address. The target redirect address shall also be included. Bandwidth limitation : –The UL maximum bitrate indicates the authorized maximum bitrate for the uplink component of the detected application traffic
Page 3 Proposal Extend the Traffic Detection Function for 3GPP2 to control the following network functions –Application based charging –QoS Control
Page 4 Application based charging Differentiate charging based on different application types for a connection –Operator may apply different charging rules for different type of traffic with the same application server. –For example, Applications such as Facebook offers different services from the same server: chat, personal-status-updates, video-call, audio-call etc. Skype offers text chat, video-call, audio call etc –Current mechanisms of charging based on 5-tuple packet filter will not work due to: Both source & destination IP addresses are the same All services uses http port
Page 5 Application based charging - details Extend current 5-tuple to 6-tuple as follows: –Source IP addr –Destination IP addr –Source port –Destination port –Protocol –Application Identifier (added in this proposal) Enhance the charging record to use 6-tuple packet filter –6-tuple is used to identify the number of packets, QoS etc. Accounting entity(PDSN/HA/LMA) hosts TDF –Mapping of Application type to the Application identifier may either be pre-configured or be sent to accounting entity (PDSN/HA/LMA) –When http based application are used, http header/MIME type may be used to derive application identifier.
Page 6 QoS Control BBERF hosts TDF/DPI function PCRF installs rules to BBERF using the 6-tuple packet filter –6-tuple Packet Filter was discussed earlier –Option-1: Static-Rules: The rules are installed statically at the time of IP connection setup The static rules may be set by AAA or by PCRF –Option-2: The rules are installed dynamically TDF signals PCRF when it detects an application whose rules are not installed PCRF obtains the rules from Application Function and passes to BBERF –Application Function identifies the application based on 6-tuple Step-2: BBERF sets up different service connections with RAN (A10 connections for (e)HRPD) with different priority –RAN follows the priority set by the BBERF for scheduling packets for different service connections
Page 7 QoS Control: RL control BBERF passes the 6-tuple packet filter to UE using RSVP –BBERF uses 6-tuple to identify the rule –ReservationLabel (Flow identifier) is based on 6-tuple Application to Application-ID mapping may be configured at the MS/AT either through pre-configuration or through configuration-downloading mechanisms